docs: def get_build_info(self):
          """Define additional build information."""
          # Retrieve build by revision
          if self.revision:
              th = treeherder.Treeherder(
                  APPLICATIONS_TO_FTP_DIRECTORY.get(self.application, self.application),
                  self.branch,
                  self.platform)
              builds = th.query_builds_by_revision(
                  self.revision,
                  job_type_name='L10n Nightly' if self.locale_build else 'Nightly')
  
              if not builds:
                  raise errors.NotFoundError('No builds have been found for revision', self.revision)
  
              # Extract the build folders which are prefixed with the buildid
              self.builds = [build.rsplit('/', 2)[1] for build in builds]
              self.show_matching_builds(self.builds)
  
              # There is only a single build per revision and platform
              self.build_index = 0
              self.logger.info('Selected build: %s' % self.builds[self.build_index])
  
              # Retrieve the date from the build folder which is always 19 chars long
              self.date = datetime.strptime(self.builds[self.build_index][:19],
                                            '%Y-%m-%d-%H-%M-%S')
  
              return
  
          # Internally we access builds via index
          if self.build_number is not None:
              self.build_index = int(self.build_number) - 1
          else:
              self.build_index = None
  
          if self.build_id:
              # A build id has been specified. Split up its components so the
              # date and time can be extracted:
              # '20111212042025' -> '2011-12-12 04:20:25'
              self.date = datetime.strptime(self.build_id, '%Y%m%d%H%M%S')
  
          elif self.date:
              # A date (without time) has been specified. Use its value and the
              # build index to find the requested build for that day.
              try:
                  self.date = datetime.strptime(self.date, '%Y-%m-%d')
              except Exception:
                  raise ValueError('%s is not a valid date' % self.date)
          else:
              # If no querying option has been specified the latest available
              # build of the given branch has to be identified. We also have to
              # retrieve the date of the build via its build id.
              self.date = self.get_latest_build_date()
  
          self.builds, self.build_index = self.get_build_info_for_date(
              self.date, self.build_index)